I think that when you are purchasing soldiers or weapons from the logistics tab ) that there should be a confirmation menu to make sure you did not mis-click.
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Clicking on a soldier by accident can be a significant waste of a soldier or weapon ticket if you recently unlocked a new class and want to fill out your optional squad slots with them.
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An opportunity to provide tool tips or other relevant information on it such as class restrictions, upgrade potential, how many you already have, etc.
While it is currently a quick and smooth process to buy stuff from the logistics tab, i can easily see some people getting frustrated at incorrectly spending the rarer weapon and soldier tickets.